90973631 has 16 divisors (see below), whose sum is σ = 106213440. Its totient is φ = 76308480.

The previous prime is 90973621. The next prime is 90973643. The reversal of 90973631 is 13637909.

It is a cyclic number.

It is not a de Polignac number, because 90973631 - 2⁶ = 90973567 is a prime.

It is a super-2 number, since 2×90973631² = 16552403074648322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90973621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109325 + ... + 110153.

It is an arithmetic number, because the mean of its divisors is an integer number (6638340).

Almost surely, 2^90973631 is an apocalyptic number.

90973631 is a deficient number, since it is larger than the sum of its proper divisors (15239809).

90973631 is a wasteful number, since it uses less digits than its factorization.

90973631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 90973631 is about 9538.0098028887. The cubic root of 90973631 is about 449.7506948294.

The spelling of 90973631 in words is "ninety million, nine hundred seventy-three thousand, six hundred thirty-one".